2027 ICD-10-CM Diagnosis Code G02Meningitis in other infectious and parasitic diseases classified elsewhere

ICD-10-CM Codes›G00–G99›G00-G09›G02

ICD-10-CM G02
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G02 is a billable ICD-10-CM diagnosis code for meningitis in other infectious and parasitic diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 23 through 24, 97 through 99, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 40 closely related codes. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Meningitis; and Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
G02
Billable Status
Yes — Valid for Submission
Code Describes
Meningitis in other infectious and parasitic diseases classified elsewhere
Short Description
Meningitis in oth infec/parastc diseases classd elswhr
Chapter
G00-G09
Inflammatory diseases of the central nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG00-G09Inflammatory diseases of the central nervous system
CategoryG02Meningitis in other infectious and parasitic diseases classified elsewhere
This CodeG02Meningitis in other infectious and parasitic diseases classified elsewhere

Code EditsBilling

Medicare Code Editor checks that affect claim validity for G02.

Manifestation diagnoses
Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • African histoplasmosis
  • African trypanosomiasis
  • Aspergillus meningitis
  • Candidal meningitis
  • Central nervous system candidiasis
  • Cerebrospinal nematodiasis
  • Coccidioidal meningitis
  • Coccidioides infection of the central nervous system
  • Cryptococcal meningitis
  • Cryptococcus infection of the central nervous system
  • Cysticercosis of central nervous system
  • Fungal meningitis
  • Histoplasma infection of central nervous system
  • Infection by Strongyloides stercoralis
  • Infection by Trypanosoma gambiense
  • Infection caused by Toxocara
  • Meningitis caused by Enterovirus
  • Meningitis caused by Histoplasma capsulatum
  • Meningitis caused by Histoplasma duboisii
  • Meningitis caused by Histoplasmosis
  • Meningitis caused by Human poliovirus
  • Meningitis caused by Mucorales
  • Meningitis caused by Taenia solium
  • Meningitis caused by Trypanosoma brucei
  • Parasitic meningitis
  • Strongyloides stercoralis meningitis
  • Toxicariasis of the central nervous system
  • Toxocara meningitis
  • Trypanosoma brucei gambiense meningitis
  • Trypanosoma brucei rhodesiense meningitis
  • Trypanosomiasis with meningitis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G02: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • candidal meningitis (B37.5)
  • coccidioidomycosis meningitis (B38.4)
  • cryptococcal meningitis (B45.1)
  • herpesviral [herpes simplex] meningitis (B00.3)
  • infectious mononucleosis complicated by meningitis (B27.- with fifth character 2)
  • measles complicated by meningitis (B05.1)
  • meningoencephalitis and meningomyelitis in other infectious and parasitic diseases classified elsewhere (G05)
  • mumps meningitis (B26.1)
  • rubella meningitis (B06.02)
  • varicella [chickenpox] meningitis (B01.0)
  • zoster meningitis (B02.1)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Code First

The underlying condition named in the note is sequenced before this code.

  • underlying disease, such as:
  • African trypanosomiasis (B56.-)
  • poliovirus infection (A80.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G02, its category, or a range that includes it.

Use Additional Code 1

These codes say to use an additional code from the note, and G02 is one of the codes named.

  • B39 Histoplasmosis
    meningitis (G02)

Notes 1

These notes mention G02.

  • G09 Sequelae of inflammatory diseases of central nervous system
    Category G09 is to be used to indicate conditions whose primary classification is to G00-G08 as the cause of sequelae, themselves classifiable elsewhere. The 'sequelae' include conditions specified as residuals. names G00-G08, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS001
Meningitis
Default principal diagnosis: inpatient No · outpatient No
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Meningitis

Meningitis is inflammation of the thin tissue that surrounds the brain and spinal cord, called the meninges. There are several types of meningitis. The most common is viral meningitis. You get it when a virus enters the body through the nose or mouth and travels to the brain. Bacterial meningitis is rare but can be deadly.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G02 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
321.1 Mening in oth fungal dis
Approximate The match is approximate rather than exact.
ICD-9-CM
321.2 Mening in oth viral dis
Approximate The match is approximate rather than exact.
ICD-9-CM
321.8 Mening in oth nonbac dis
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G02Overview

Is G02 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report meningitis in other infectious and parasitic diseases classified elsewhere on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does G02 group to?

On inpatient claims, meningitis in other infectious and parasitic diseases classified elsewhere maps to MS-DRG 793, 791, 24, 98, 99, 23, 97, with relative weights from 1.5249 to 5.7422 depending on complications. Higher weights mean higher Medicare reimbursement.

Is G02 a CC or MCC?

CMS lists G02 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 40 closely related codes in its exclusion list.

Can G02 be a principal diagnosis?

No. This is a manifestation code: meningitis in other infectious and parasitic diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.

Can G02 be reported with B37.5?

Not as a rule. The Excludes1 note on G02 lists "candidal meningitis (B37.5)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).